72547730 has 16 divisors (see below), whose sum is σ = 130749120. Its totient is φ = 28982832.

The previous prime is 72547711. The next prime is 72547747. The reversal of 72547730 is 3774527.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4781 + ... + 12959.

It is an arithmetic number, because the mean of its divisors is an integer number (8171820).

Almost surely, 2^72547730 is an apocalyptic number.

72547730 is a deficient number, since it is larger than the sum of its proper divisors (58201390).

72547730 is a wasteful number, since it uses less digits than its factorization.

72547730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 72547730 is about 8517.4955239202. The cubic root of 72547730 is about 417.0690307003.

The spelling of 72547730 in words is "seventy-two million, five hundred forty-seven thousand, seven hundred thirty".